Thermal ground state for pure SU(2) Yang-Mills thermodynamics

Details Thermal ground state for pure SU(2) Yang-Mills thermodynamics Thermal ground state for pure SU(2) Yang-Mills thermodynamics

2008-12-15

arxiv.org/abs/0812.2898v2

PoS Confinement8:124,2008

Physics

High Energy Physics

High Energy Physics - Theory

Based on the presentation given at Confinement8, 1-6 September 2008, Mainz, Germany. To appear in Proceedings of Science. 6 pa

Scientific paper

In this proceeding the emergence of a composite, adjoint-scalar field as an average over (trivial holonomy) calorons and anti-calorons is reviewed. This composite field acts as a background field to the dynamics of perturbative gluons, to which is coupled via an effective, gauge invariant Lagrangian valid for temperatures above the deconfinement phase transition. Moreover, also an Higgs mechanism is induced by the composite field: two gluons acquire a quasi-particle thermal mass. On the phenomenological side the composite field acts as a bag pressure which shows a linear dependence on the temperature. As a result the linear rise with temperature of the trace anomaly is obtained and is compared to recent lattice studies.

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